Oil recovery quality inspection system and aviation oil storage system

Abstract

The invention provides an oil product recovery quality inspection system and an aviation oil storage system. The oil product recovery quality inspection system comprises a main pipeline, an oil pump unit, a plurality of oil product quality inspection units and an oil product recovery unit. The main pipeline comprises an outlet end and a plurality of inlet ends, an inlet of the oil pump unit is connected with the outlet end, the oil quality inspection units are used for being connected with corresponding oil storage tanks and distributed along the main pipeline at intervals, each oil quality inspection unit comprises a first flow meter and a sampler, and the first flow meters and the samplers are connected between the outlets and the inlet ends of the oil storage tanks in parallel. The first flowmeter is used for metering the amount of oil flowing out of the bottom of the oil storage tank, the sampler is used for sampling and detecting the oil at the bottom of the oil storage tank, an inlet of the oil recovery unit is connected with an outlet of the oil pump unit, and an outlet of the oil recovery unit is connected to the inlet end. By means of the arrangement, arrangement of pipelines is simplified, cost is reduced, workers can be prevented from directly facing oil products, and the bodies and the environment of the workers are protected.

Description

Technical Field

[0001] The present application relates to the technical field of aviation fuel storage, and in particular to an oil product recovery quality inspection system and an aviation fuel storage system including the oil product recovery quality inspection system. Background Art

[0002] In the traditional oil recovery system, the oil at the bottom of multiple oil storage tanks needs to be recovered and stored through different recovery pipelines. The pipeline distribution is complicated, occupies a large area, and requires a lot of manpower and material resources, resulting in high costs.

[0003] When recycling oil products, it is necessary to discharge the oil products at the bottom of the oil tank to a certain amount before conducting oil quality inspection. In the current existing technology, the process of oil product discharge and the amount of oil taken need to be completed manually, so the staff need to face the oil products directly and need to observe the amount of oil products, which is very harmful to the health of the staff. In this process, the oil products will also be exposed to the air, causing certain pollution to the environment. Summary of the invention

[0004] The present application provides an improved oil product recovery quality inspection system and an aviation fuel storage system including the oil product recovery quality inspection system.

[0005] The present application provides an oil recovery quality inspection system, including:

[0006] A main pipe, including an outlet port and multiple inlet ports;

[0007] An oil pump unit, wherein the inlet of the oil pump unit is connected to the outlet;

[0008] A plurality of oil quality inspection units, which are used to be connected to corresponding oil storage tanks and are distributed at intervals along the main pipeline, wherein the oil quality inspection units include a first flow meter and a sampler, wherein the first flow meter and the sampler are connected in parallel between the outlet and the inlet of the oil storage tank, wherein the first flow meter is used to measure the amount of oil flowing out from the bottom of the oil storage tank, and the sampler is used to sample and inspect the oil at the bottom of the oil storage tank;

[0009] An oil recovery unit, wherein the inlet of the oil recovery unit is connected to the outlet of the oil pump unit, the outlet of the oil recovery unit is connected to the inlet end, the main pipeline is used to receive the oil flowing out of the oil quality inspection unit, the oil pump unit is used to transport the oil in the main pipeline to the oil recovery unit, and the oil recovery unit is used to recover and store the oil.

[0010] Optionally, the oil recovery quality inspection system includes a first solenoid valve, which is arranged at the inlet of the first flowmeter, and the first solenoid valve is used to control the opening or closing of the inlet of the first flowmeter.

[0011] Optionally, the oil recovery quality inspection system includes a first controller electrically connected to the first solenoid valve and the first flow meter, and the first controller is used to control the first solenoid valve to disconnect when the oil amount in the first flow meter reaches a preset capacity to close the inlet of the first flow meter.

[0012] Optionally, the oil recovery quality inspection system further includes a recovery pipeline, and the multiple oil quality inspection units are distributed at intervals on both sides of the main pipeline and are connected to the inlet end through the recovery pipeline.

[0013] Optionally, the main pipeline and the recovery pipeline are arranged on the same horizontal plane.

[0014] Optionally, the setting position of the inlet of the oil pump unit is lower than the setting position of the outlet end.

[0015] Optionally, the oil recovery quality inspection system also includes a buffer pipeline, the inlet of the buffer pipeline is connected to the outlet end, the outlet of the buffer pipeline is connected to the inlet of the oil pump unit, and the setting position of the inlet of the buffer pipeline is lower than the setting position of the outlet end.

[0016] Optionally, the buffer pipeline includes a first end connected to the outlet end and a second end connected to the inlet of the oil pump unit, and the setting position of the second end is lower than the setting position of the first end.

[0017] Optionally, the oil recovery quality inspection system further includes a buffer tank, which is arranged at the outlet end, the buffer tank is arranged at a position lower than the main pipeline, and the oil pump unit is arranged in the buffer tank.

[0018] Optionally, the oil pump unit includes a pump, an inlet valve and an outlet valve, the inlet valve is connected between the inlet of the pump and the outlet end, and the outlet valve is connected between the outlet of the pump and the inlet of the oil recovery unit.

[0019] Optionally, the inlet valve remains in a normally open state; and / or

[0020] The outlet valve is not fully open.

[0021] Optionally, the oil pump unit further includes an exhaust valve, which is arranged between the outlet of the pump and the outlet valve.

[0022] Optionally, the exhaust valve comprises an automatic exhaust valve; and / or

[0023] The exhaust valve remains in a normally open state.

[0024] Optionally, the oil recovery unit includes a first oil recovery unit and a second oil recovery unit, the first oil recovery unit and the second oil recovery unit are connected in parallel between the outlet and the inlet end of the oil pump unit, and the quality of the oil recovered by the first oil recovery unit is higher than the quality of the oil recovered by the second oil recovery unit.

[0025] Optionally, the oil recovery unit includes a second flow meter and a recovery tank, the inlet of the recovery tank is connected to the outlet of the oil pump unit, the second flow meter is connected between the outlet and the inlet of the recovery tank, the second flow meter is used to measure the amount of oil at the bottom of the recovery tank, and the recovery tank is used to recover and store the oil.

[0026] Optionally, the oil recovery quality inspection system includes a second solenoid valve, which is arranged at the inlet of the second flowmeter, and the second solenoid valve is used to control the opening or closing of the inlet of the second flowmeter.

[0027] Optionally, the oil recovery quality inspection system includes a second controller electrically connected to the second solenoid valve and the second flow meter, and the second controller is used to control the second solenoid valve to cut off power to close the inlet of the second flow meter when the oil amount in the second flow meter reaches a preset capacity.

[0028] Optionally, the recovery pipeline includes a first recovery pipeline and a second recovery pipeline, the recovery tank is connected to the outlet of the oil pump unit through the first recovery pipeline, and the second flow meter is connected to the inlet end through the second recovery pipeline.

[0029] Optionally, a first ball valve is provided on the second recovery pipeline, and the first ball valve is arranged downstream of the outlet of the second flow meter.

[0030] Optionally, the recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline, the second flow meter is connected to the treatment pool through the third recovery pipeline, and the second flow meter is connected to the zero-level tank through the fourth recovery pipeline, and the quality of the oil stored in the treatment pool is higher than the quality of the oil stored in the zero-level tank.

[0031] Optionally, a second ball valve is provided on the third recovery pipeline, and the second ball valve is provided upstream of the inlet of the treatment pool; a third ball valve is provided on the fourth recovery pipeline, and the third ball valve is provided upstream of the inlet of the zero-level tank.

[0032] Optionally, the setting position of the first ball valve is higher than the setting positions of the second ball valve and the third ball valve.

[0033] Optionally, a safety liquid level line is provided in the recovery tank, and the safety liquid level line does not exceed half of the height of the recovery tank; the oil recovery quality inspection system also includes a plurality of spare tanks and delivery pipelines, the spare tanks are connected to the recovery tanks via the delivery pipelines, and the delivery pipelines are used to transport at least part of the oil in the recovery tank to the spare tanks for storage when the oil in the recovery tank exceeds the safety liquid level line.

[0034] Optionally, the recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline; the first flowmeter is connected to the oil storage tank through the third recovery pipeline, and the first flowmeter is connected to the inlet end through the fourth recovery pipeline.

[0035] Optionally, the third recovery pipeline and the fourth recovery pipeline are arranged on the same horizontal plane.

[0036] Optionally, a fourth ball valve and a first automatic return valve are provided on the third recovery pipeline, the fourth ball valve is provided downstream of the outlet of the oil storage tank, and the first automatic return valve is provided upstream of the inlet of the first flowmeter; a fifth ball valve is provided on the fourth recovery pipeline, and the fifth ball valve is provided downstream of the outlet of the first flowmeter.

[0037] Optionally, the fourth ball valve remains in a normally open state.

[0038] Optionally, the recovery pipeline includes a fifth recovery pipeline and a sixth recovery pipeline; the sampler is connected to the third recovery pipeline through the fifth recovery pipeline, and the sampler is connected to the fourth recovery pipeline through the sixth recovery pipeline.

[0039] Optionally, the fifth recovery pipeline and the sixth recovery pipeline are arranged on the same horizontal plane.

[0040] Optionally, the fifth recovery pipeline and the sixth recovery pipeline are set at positions no higher than the third recovery pipeline and the fourth recovery pipeline.

[0041] Optionally, a second automatic return valve is provided on the fifth recovery pipeline, and the second automatic return valve is provided upstream of the inlet of the sampler.

[0042] An embodiment of the present application also provides an aviation fuel storage system, comprising a plurality of oil storage tanks and an oil recovery and quality inspection system as described in any one of the above items, wherein the plurality of oil quality inspection units of the oil recovery and quality inspection system correspond to the plurality of oil storage tanks.

[0043] According to the technical solution provided in the embodiment of the present application, it includes a main pipeline, an oil pump unit, multiple oil quality inspection units and an oil recovery unit. The multiple oil quality inspection units are connected to the corresponding oil storage tanks and are distributed at intervals along the main pipeline. The oil quality inspection unit includes a first flow meter and a sampler. The first flow meter and the sampler are connected in parallel between the outlet and the inlet of the oil storage tank. With such an arrangement, the amount of oil flowing out from the bottom of the oil storage tank can be measured by the first flow meter without the need for staff to observe, thereby avoiding staff from directly facing the oil and protecting the staff's body and the environment. In addition, the multiple oil quality inspection units discharge the oil at the bottom of the oil tanks of the multiple oil storage tanks into the main pipeline, and uniformly transport the oil in the main pipeline to the oil recovery unit for recovery and storage through the oil pump unit, thereby simplifying the arrangement of the pipelines and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Shown is a structural schematic diagram of an embodiment of the aviation fuel storage system of the present application;

[0045] Figure 2 Shown is a structural schematic diagram of an embodiment of a first flow meter of an oil quality inspection unit of the present application;

[0046] Figure 3 Shown Figure 2 A cross-sectional schematic diagram of an embodiment of a first flow meter is shown;

[0047] Figure 4 Shown Figure 2 A circuit schematic diagram of an embodiment of the first flow meter shown;

[0048] Figure 5 Shown is a cross-sectional schematic diagram of an embodiment of a pump of the oil pump assembly of the present application, wherein a reed switch of the pump is open;

[0049] Figure 6 Shown Figure 5 Another schematic cross-sectional view of a pump of the oil pump assembly shown, wherein the reed switch of the pump is closed;

[0050] Figure 7 Shown is a structural schematic diagram of another embodiment of the aviation fuel storage system of the present application;

[0051] Figure 8 Shown is a structural schematic diagram of another embodiment of the aviation fuel storage system of the present application. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0053] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "one" or "one" and the like used in this application specification and claims do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" includes two, which is equivalent to at least two. "Including" or "including" and the like mean that the elements or objects appearing in front of "including" or "including" include the elements or objects listed after "including" or "including" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and the like are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in this application specification and the attached claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0054] The oil recovery quality inspection system of the embodiment of the present application includes a main pipeline, an oil pump unit, multiple oil quality inspection units and an oil recovery unit. Among them, the main pipeline includes an outlet end and multiple inlet ends, the inlet of the oil pump unit is connected to the outlet end, the multiple oil quality inspection units are used to connect with the corresponding oil storage tanks and are distributed at intervals along the main pipeline, the oil quality inspection unit includes a first flow meter and a sampler, the first flow meter and the sampler are connected in parallel between the outlet and the inlet end of the oil storage tank, the first flow meter is used to measure the amount of oil flowing out from the bottom of the oil storage tank, the sampler is used to sample and detect the oil at the bottom of the oil storage tank, the inlet of the oil recovery unit is connected to the outlet of the oil pump unit, the outlet of the oil recovery unit is connected to the inlet end, the main pipeline is used to receive the oil flowing out of the oil quality inspection unit, the oil pump unit is used to transport the oil in the main pipeline to the oil recovery unit, and the oil recovery unit is used to recover and store oil.

[0055] With this arrangement, the amount of oil flowing out from the bottom of the oil storage tank can be measured by the first flow meter without the need for staff observation, thus avoiding the staff from directly facing the oil, which is beneficial to the health of the staff and will not cause pollution to the environment. Multiple oil quality inspection units can be discharged into the main pipeline, and the oil in the main pipeline can be uniformly transported to the oil recovery unit for recovery and storage through the oil pump unit. Compared with related technologies, this shortens the recovery cycle, reduces manpower and time, simplifies the layout of the pipelines, and reduces costs.

[0056] The present application provides an aviation fuel storage system, including multiple oil storage tanks and an oil recovery quality inspection system, wherein multiple oil quality inspection units of the oil recovery quality inspection system correspond to multiple oil storage tanks. In some embodiments, the aviation fuel storage system is used for quality inspection and recycling of civil aviation fuel, and the oil recovery quality inspection system can detect the oil stored at the bottom of the oil storage tank and recycle and utilize it again. By connecting multiple oil storage tanks with the oil recovery quality inspection system, the oil at the bottom of multiple oil storage tanks is discharged into the main pipeline through multiple oil quality inspection units, and the oil in the main pipeline is uniformly transported to the oil recovery unit for recycling and storage through an oil pump unit. Compared with the related art, the arrangement of pipelines is simplified and the cost is reduced. In this process, the amount of oil flowing out from the bottom of the oil storage tank can be measured by a first flow meter without the need for staff to observe, so as to avoid the staff from directly facing the oil, which is beneficial to the health of the staff and does not cause pollution to the environment.

[0057] Figure 1 FIG. 2 is a schematic diagram of the structure of an embodiment of an aviation fuel storage system 200 of the present application. The aviation fuel storage system 200 includes a plurality of fuel storage tanks 50 and a fuel recovery quality inspection system 100. Figure 1As shown, the oil recovery quality inspection system 100 includes multiple oil quality inspection units 10, a main line 20, an oil pump unit 30 and an oil recovery unit 40. Multiple oil quality inspection units 10 are connected to the same oil pump unit 30 through the main line 20. In some embodiments, the main line 20 includes an outlet port 21 and multiple inlet ports 22. The main line 20 includes a pipe body, and multiple inlet ports 22 are arranged on the pipe wall of the pipe body, which can be arranged at one end of the pipe body away from the outlet port 21 (it can also be understood as the end opposite to the outlet port 21). The main line 20 is used to receive the oil flowing out of the oil quality inspection unit 10. The oil here refers to a petroleum product, which can be aviation kerosene, referred to as "aviation fuel". In some other embodiments, the oil can be other petroleum products, which are not limited to this in the present application. In some embodiments, the inlet of the oil pump unit 30 is connected to the outlet port 21, and the oil pump unit 30 is used to transport the oil in the main line 20 to the oil recovery unit 40. In this embodiment, the oil pump unit 30 can be a self-priming centrifugal pump. In some other embodiments, the oil pump unit 30 may be other types of pumps, which are not limited to this in the present application. In some embodiments, a plurality of oil quality inspection units 10 are used to connect to the corresponding oil storage tanks 50, and the plurality of oil quality inspection units 10 are spaced along the main pipeline 20, and the outlet of the oil quality inspection unit 10 is connected to the inlet end 22, and the oil quality inspection unit 10 is used to receive the oil at the bottom of the oil storage tank 50 for testing. The oil storage tank 50 here refers to an oil tank, which is large in size. In order to ensure safety and comply with national standards, the plurality of oil storage tanks 50 are spaced between each two oil storage tanks 50, and the interval between the two oil storage tanks 50 is not less than half of the sum of the heights of the two oil storage tanks 50. For example, in the present embodiment, the height of the oil storage tank 50 is 18 meters, so in the direction along the main pipeline 20, the distance between the two oil storage tanks 50 is not less than 18 meters, so as to ensure safety and comply with national standards. Therefore, the spaced distribution of the plurality of oil quality inspection units 10 along the main pipeline 20 meets national standards and ensures safety.

[0058] In some embodiments, the inlet of the oil recovery unit 40 is connected to the outlet of the oil pump unit 30, and the outlet of the oil recovery unit 40 is connected to the inlet end 22. The oil recovery unit 40 is used to recover and store oil. The oil recovery unit 40 is used to recover oil with high quality, for example, it needs to be tested before being used again, and can be reused when it passes the test. On the other hand, it is used to store oil with low quality, which can be used for other treatments. With this arrangement, the oil at the bottom of the oil storage tank 50 can be fully utilized, and the oil at the bottom of the oil storage tank 50 can be regularly recycled, thereby improving the quality of the oil in the oil storage tank 50. The oil products at the bottom of the multiple oil storage tanks 50 are discharged into the main pipeline 20 through the multiple oil quality inspection units 10, and the oil products in the main pipeline 20 are uniformly transported to the oil recovery unit 40 for recovery and storage through the oil pump unit 30, thereby simplifying the arrangement of the pipelines and reducing costs. Moreover, since the amount of oil products for quality inspection discharged from the bottom of each oil storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, the oil products discharged from the bottom of the multiple oil storage tanks 50 are collected and recovered uniformly, which can shorten the recovery cycle and reduce manpower and time.

[0059] In some embodiments, the oil quality inspection unit 10 includes a first flow meter 11 and a sampler 13, the first flow meter 11 and the sampler 13 are connected in parallel between the outlet and the inlet end 22 of the oil storage tank 50, the first flow meter 11 is used to measure the amount of oil flowing out from the bottom of the oil storage tank 50, and the sampler 13 is used to sample and detect the oil at the bottom of the oil storage tank 50. Since the recovery pipeline 60 connected between the first flow meter 11 (or the sampler 13) and the oil storage tank 50 has a distance, the first flow meter 11 is required to measure the amount of part of the oil at the bottom of the oil storage tank 50 (wherein the part of the oil here includes the oil in the fifth recovery pipeline 65 connected between the first flow meter 11 and the oil storage tank 50) to discharge part of the oil to the first flow meter 11, so that the oil obtained by the subsequent sampler 13 is more representative, thereby making the detection error smaller. With such arrangement, the amount of oil flowing out from the bottom of the oil storage tank 50 is measured by the first flow meter 11, so that the workers are prevented from directly facing the oil, which is beneficial to the health of the workers and does not cause pollution to the environment.

[0060] In some embodiments, the oil quality inspection unit 10 includes a first solenoid valve 111 and a first controller 112, which are arranged at the inlet of the first flowmeter 11, and the first solenoid valve 111 is used to control the opening or closing of the inlet of the first flowmeter 11. The first controller 112 is electrically connected to the first solenoid valve 111 and the first flowmeter 11, and the first controller 112 is used to control the first solenoid valve 111 to disconnect when the flow of the first flowmeter 11 reaches a preset capacity (for example, 70L-90L, preferably 80L), so as to close the inlet of the first flowmeter 11. In some embodiments, when the oil at the bottom of the oil storage tank 50 needs to be discharged into the first flowmeter 11, the first controller 112 controls the first solenoid valve 111 to open, and the first flowmeter 11 starts to measure the oil flowing out from the bottom of the oil storage tank 50. In some embodiments, when the amount of oil in the first flowmeter 11 reaches the preset capacity, a feedback signal is sent to the first controller 112, and at this time, the first controller 112 controls the first solenoid valve 111 to close, and the first flowmeter 11 stops measuring the oil flowing out from the bottom of the oil storage tank 50.

[0061] Figure 2 The figure shows a structural schematic diagram of an embodiment of the first flow meter 11 of the oil quality inspection unit 10 of the present application; Figure 3 Shown Figure 2 A schematic cross-sectional view of an embodiment of the first flow meter 11 is shown; Figure 4 Shown Figure 2 A circuit schematic diagram of an embodiment of the first flowmeter 11 is shown. In some embodiments, the first flowmeter 11 may be a vortex flowmeter. In some other embodiments, the first flowmeter 11 may also be a float flowmeter. In some other embodiments, the first flowmeter 11 may also be other types of flowmeters, which are not limited to this in the present application and will not be described in detail here.

[0062] like Figures 2 to 4 As shown, the first flowmeter 11 includes a housing 101, a turbine disposed in the housing 101, an induction coil 115 wound around the outside of the housing 101, and a signal conversion circuit 113 electrically connected to the induction coil 115. The turbine is used to generate a driving force for the oil product flowing into the inlet of the first flowmeter 11 to drive the oil product to rotate, the induction coil 115 is used to generate a corresponding induction signal when the oil product rotates, and the signal conversion circuit 113 is used to convert the induction signal into a corresponding flow value of the oil product.

[0063] exist Figure 4In the embodiment shown, the signal conversion circuit 113 includes an amplifier 1131 connected to the induction coil 115, a counter 1132 and a frequency generator 1133 electrically connected to the amplifier 1131, the amplifier 1131 is used to amplify and shape the induction signal output by the induction coil 115, the counter 1132 is used to calculate and indicate the cumulative flow value of the oil product flowing into the housing 101, and the frequency generator 1133 is used to calculate and indicate the instantaneous flow value of the oil product flowing into the housing 101. In some embodiments, the first flow meter 11 also includes a display 114 (such as Figure 2 As shown), electrically connected to the signal conversion circuit 113 (electrically connected to the counter 1132 and the frequency meter 1133), used to display the accumulated flow value and the instantaneous flow meter output by the signal conversion circuit 113, so as to facilitate observation by the staff.

[0064] In some embodiments, the turbine includes a bearing 1121 and blades 1122 fixed to the bearing, and the bearing 1121 is fixed in the housing 101. When the oil flows into the housing 101, it impacts the blades 1122 of the turbine, generating a driving torque on the blades 1122, causing the blades 1122 to overcome the friction torque and the oil resistance torque and rotate. Within a certain flow range, for a certain oil medium viscosity, the angular velocity of rotation of the blades 1122 is proportional to the flow rate of the oil. Therefore, the flow rate of the oil can be obtained by the angular velocity of rotation of the blades 1122, so that the amount of oil passing through the housing 101 can be calculated. In some embodiments, the rotation speed of the blades 1122 is detected by an induction coil 115 installed outside the housing 101. When the blades 1122 cut the magnetic lines of force generated by the permanent magnets in the housing 101, it will cause a change in the magnetic flux in the induction coil 115. Figure 3 In the embodiment of the present invention, the induction coil 115 and the permanent magnet 116 are fixed together on the housing 101. When the ferromagnetic blade 1122 passes by the permanent magnet 116, the magnetic flux in the induction coil 115 is changed, thereby generating an induction signal.

[0065] Furthermore, the induction coil 115 sends the detected magnetic flux period change signal (induction signal) to the amplifier 1131, which amplifies and shapes the signal to generate a pulse signal proportional to the flow rate, and sends it to the counter 1132 to obtain and display the cumulative flow value (that is, the amount of oil flowing out from the bottom of the oil storage tank 50) through unit conversion and flow accumulation calculation. At the same time, the pulse signal can also be sent to the frequency device 1133 to convert the pulse signal into an analog current, thereby indicating the instantaneous flow value (that is, the instantaneous amount of oil flowing out from the bottom of the oil storage tank 50). Then, the output cumulative flow value and instantaneous flow meter are displayed through the display 114, which is convenient for staff to observe.

[0066] With such a configuration, the first flow meter 11 can be used to detect the instantaneous amount of oil and the total accumulated amount. Its output signal is a frequency, which is easy to digitize. In addition, the first flow meter 11 has a small pressure loss, and the blade 1122 is corrosion-resistant, and can measure viscous and corrosive media. Compared with the relevant technology, the first flow meter 11 can measure the amount of oil (including the total amount and instantaneous flow rate) flowing out from the bottom of the oil storage tank 50, avoiding the staff from directly facing the oil, which is beneficial to the health of the staff and will not cause pollution to the environment.

[0067] In some embodiments, multiple oil quality inspection units 10 can be provided (for example, 3 or more), and multiple oil quality inspection units 10 are distributed at intervals on both sides of the main pipeline 20. Such a configuration can effectively utilize the areas on both sides of the main pipeline 20, so that multiple oil quality inspection units 10 are evenly distributed, reducing the floor space, simplifying the distribution of pipelines, and reducing costs. In some embodiments, the oil recovery quality inspection system 100 also includes a recovery pipeline 60, and multiple oil quality inspection units 10 are connected to the inlet end 22 through the recovery pipeline 60. Multiple oil quality inspection units 10 are connected to the inlet end 22 through the recovery pipeline 60, reducing the number of main pipelines 20 laid, reducing the floor space of the main pipeline 20, thereby simplifying the distribution of pipelines and reducing costs.

[0068] In this embodiment, the oil storage tank 50 is a cone bottom tank (such as Figure 1 As shown in the figure, by utilizing the static pressure generated by the cone-bottom tank (the static pressure generated by the cone-bottom tank is very large, and the pressure generated is also very large), by arranging the main line 20 and the recovery line 60 at the same horizontal plane, the water and impurities at the bottom of the oil storage tank 50 are easily discharged, thereby improving the recovery efficiency. In addition, since the entire system occupies a large area, by arranging the main line 20 and the recovery line 60 horizontally and arranging the main line 20 and the recovery line 60 at the same horizontal plane, such an arrangement can reduce the complexity of construction, thereby reducing costs. In some other embodiments, the main line 20 and the recovery line 60 may not be at the same horizontal plane.

[0069] In some embodiments, the oil pump unit 30 includes a self-priming centrifugal pump, and the self-priming centrifugal pump can send out the oil due to the centrifugal force. In some embodiments, the oil pump unit 30 includes a pump 31, an inlet valve 32 and an outlet valve 33. The inlet valve 32 is connected between the inlet and outlet ends 21 of the pump 31, and the outlet valve 33 is connected between the outlet of the pump 31 and the inlet of the oil recovery unit 40. In order to ensure that the oil discharged from the outlet end 21 can be completely discharged into the pump 31, the inlet size of the pump 31 is adapted to the size of the outlet end 21. Before the oil pump unit 30 works, the pump 31 must be filled with oil to form a vacuum state. When the impeller rotates rapidly, the blades cause the oil to rotate quickly. The rotating oil flies out of the impeller under the action of centrifugal force. After the oil in the pump 31 is thrown out, a vacuum area is formed in the central part of the impeller. The oil in the main pipeline 20 is pressed into the oil recovery unit 40 through the recovery pipeline 60 under the action of atmospheric pressure or oil pressure. Such a cyclic operation can realize continuous oil pumping. It should be noted that the self-priming centrifugal pump must be started after the pump 31 is filled with oil before starting, otherwise the pump 31 will heat up, vibrate, and reduce the amount of oil, causing damage to the oil pump unit 30 and equipment accidents. Therefore, the setting position of the inlet of the oil pump unit 30 is lower than the setting position of the outlet end 21, and the inlet valve 32 is kept in a normally open state, so that the inlet of the oil pump unit 30 (pump 31) is kept filled with oil before starting, so that the oil pump unit 30 (pump 31) can work normally. Further, in order to ensure that the pump 31 can smoothly transport the oil in the main line 20 to the oil recovery unit 40, the outlet valve 33 is not fully opened. For example, the opening of the outlet valve 33 is opened to no more than one-fourth, which can increase the conveying pressure and the conveying speed, so that the oil in the main line 20 and the recovery line 60 can be quickly recovered to the oil recovery unit 40. It should be noted that the opening of the outlet valve 33 is determined according to the model (rated voltage / current) of the pump 31. When the pump 31 is used, opening the outlet valve 33 to one-fourth of the outlet valve 33 opening will generate pressure, and this generated pressure can press the oil in the main line 20 into the oil recovery unit 40. If the outlet valve 33 is opened too much, it will generate very strong pressure. For example, when the pressure is too high or the load is too high at the beginning, the rated voltage / current of the pump 31 is reached in an instant, which can easily burn the pump 31. Therefore, when the pump 31 is just started, the outlet valve 33 is not set to be fully opened. For example, the outlet valve 33 is opened to no more than one-fourth. On the one hand, the pressure generated is sufficient, and on the other hand, it will not have side effects on the pump 31 itself.

[0070] Figure 5 FIG. 1 is a cross-sectional schematic diagram of an embodiment of a pump 31 of an oil pump assembly 30 of the present application, wherein a reed switch 311 of the pump 31 is turned on; Figure 6 Shown Figure 5Another cross-sectional schematic diagram of the pump 31 of the oil pump unit 30 is shown, wherein the reed switch 311 of the pump 31 is closed. In some embodiments, the oil pump unit 30 includes an automatic mode. Figure 5 and Figure 6 As shown, a float switch is provided in the pump 31, and the float switch includes a reed switch 311 and a float 312 provided on the reed switch 311. The reed switch 311 is electrically connected to an external power switch. In some embodiments, the reed switch 311 includes two magnetizable reeds 313 (usually composed of two metals, iron and nickel) and a magnetic member 314 sleeved in the float 312. The magnetic member 314 can be a permanent magnet or an electromagnetic coil. The two reeds 313 are sealed in a glass tube, and the reed 313 acts as a magnetic flux conductor. Figure 5 As shown, before operation, the two spring leaves 313 are not in contact. Figure 6 As shown, when the magnetic field is generated by the magnetic member 314, the external magnetic field causes different polarities to be generated near the end positions of the two reeds. When the magnetic force exceeds the elastic force of the reed 313 itself, the two reeds 313 will attract and conduct the circuit. When the magnetic field weakens or disappears, the reed 313 is released due to its own elasticity, and the two reeds 313 will separate to open the circuit. In this embodiment, when the water level in the pump 31 rises, the float 312 drives the magnetic member 314 to rise. Under the action of the external magnetic field, the two reeds 313 attract and turn on the power switch, and the pump 31 is started at this time; when the water level in the pump 31 drops, the float 312 drives the magnetic member 314 to drop. After the magnetic field weakens or disappears, the reed 313 is released due to its own elasticity, and the pump 31 is turned off at this time. Compared with the related art, the pump 31 using the oil pump unit 30 can realize automatic oil pumping and automatic shutoff, without the need for real-time monitoring by staff. Such a setting reduces a lot of manpower. In addition, in this embodiment, only one oil pump unit 30 is needed to provide power, so that the oil products collected in the main pipeline 20 are recovered to the oil product recovery unit 40. Compared with the related art, the number of oil pump units 30 is reduced, and the cost is reduced. In addition, when the liquid level in the float switch reaches a certain height, the reed switch 311 is closed, and the pump 31 can be started. If the oil quality inspection unit 10 of each oil storage tank 50 is connected to an oil pump unit 30, due to the small amount of oil products, the oil pumped out is even less, and the oil left in the recovery pipeline 60 of the oil quality inspection unit 10 is more. The oil products discharged from the bottom of multiple oil storage tanks 50 flow into the main pipeline 20, so that the total amount of oil products flowing into the inlet of the pump 31 is more. When summarized, the liquid level in the float switch is higher, the reed switch 311 of the float switch is closed for a long time, and the pump 31 pumps out more oil.

[0071] It should be noted that when oil needs to be recovered, the staff needs to turn on the main power supply of the power distribution cabinet connected to the pump 31, and put the control mode of the pump 31 into the automatic mode. When the oil in the main line 20 flows into the pump 31, and the permanent magnet or electromagnetic coil of the float 312 rises and the two reeds 313 are attracted, it can be started to discharge the oil into the oil recovery unit 40. When the amount of oil in the main line 20 flowing into the pump 31 gradually decreases, and the permanent magnet or electromagnetic coil of the float 312 drops, after the magnetic field weakens or disappears, the two reeds 313 are released, thereby ending the recovery. When the recovery is completed, turn off the main power supply of the power distribution cabinet, put the control mode of the pump 31 into the intermediate mode, and close the outlet valve 33 of the pump 31. The intermediate mode here can be a non-automatic mode, which is not limited to this in the present application.

[0072] In some embodiments, the oil pump unit 30 further includes an exhaust valve 34, which is disposed between the outlet of the pump 31 and the outlet valve 33. The exhaust valve 34 is used to remove the air in the pump 31 to ensure that the oil delivered from the outlet valve 33 is free of air. In some embodiments, the exhaust valve 34 includes an automatic exhaust valve. In some embodiments, a float switch (not shown) is disposed in the exhaust valve 34, and the exhaust valve 34 is kept in a normally open state. When the pump 31 is just started, the oil in the pump 31 is not fully discharged, and some air is discharged through the exhaust valve 34 (generally, the air is discharged upward). Then, as the oil level rises, when the oil in the pump 31 is fully discharged, that is, the float switch reaches the upper limit of the liquid level, at this time, the exhaust valve 34 is automatically closed without the need for human operation, which is simple and quick.

[0073] Figure 7 The structure diagram of another embodiment of the aviation fuel storage system 200 of the present application is shown. In this embodiment, the oil pump unit 30 adopts a self-priming centrifugal pump, in order to ensure that the inlet of the oil pump unit 30 is filled with oil before starting. Figure 7As shown, the oil recovery quality inspection system 100 also includes a buffer pipeline 23, the inlet of the buffer pipeline 23 is connected to the outlet end 21, and the outlet of the buffer pipeline 23 is connected to the inlet of the oil pump unit 30. The setting position of the inlet of the buffer pipeline 23 is lower than the setting position of the outlet end 21, so that there is a terrain difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main pipeline 20, so that the inlet of the pump 31 is filled with oil as much as possible. Because the pump 31 can only be started when the liquid level in the pump reaches a certain height, if the oil quality inspection unit 10 of each oil storage tank 50 is connected to an oil pump unit 30, the pump 31 cannot be started due to less oil, and when the pump 31 can be started, less oil is pumped out, and more oil remains in the recovery pipeline 60 of the oil quality inspection unit 10. If the oil discharged from the bottom of multiple oil storage tanks 50 flows into the main pipeline 20, the total amount of oil flowing into the inlet of the pump 31 will be larger and collected together, and the liquid level in the pump 31 will be higher, so that the inlet of the pump 31 is filled with oil as much as possible to ensure normal startup, and more oil can be pumped out through unified recovery. In addition, the setting position of the inlet of the buffer pipeline 23 is lower than the setting position of the outlet end 21, which can also ensure that the oil in the main pipeline 20 is easier to discharge.

[0074] In some embodiments, the buffer line 23 includes a first end 231 connected to the outlet end 21 and a second end 232 connected to the inlet of the oil pump unit 30, and the second end 232 is disposed at a position lower than the first end 231. Since the amount of oil discharged from the bottom of each oil storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, the second end 232 is disposed at a position lower than the first end 231, that is, there is a terrain difference between the second end 232 and the first end 231, so that there is a terrain difference between the inlet of the oil pump unit 30 connected to the second end 232 and the outlet end 21 of the main line 20 connected to the first end 231, so that the inlet of the pump unit 31 is filled with oil as much as possible. Because the pump 31 can only be started when the liquid level in it reaches a certain height, if the oil quality inspection unit 10 of each oil storage tank 50 is connected to an oil pump unit 30, the pump 31 cannot be started due to less oil, and when the pump 31 can be started, less oil is pumped out, and more oil remains in the recovery pipeline 60 of the oil quality inspection unit 10. If the oil discharged from the bottom of multiple oil storage tanks 50 flows into the main pipeline 20, the total amount of oil flowing into the inlet of the pump 31 is large, and when it is collected together, the liquid level in the pump 31 is higher, thereby ensuring that the inlet of the pump 31 is filled with oil as much as possible, ensuring that it can be started normally, and more oil can be pumped out through unified recovery. In addition, the terrain difference between the inlet of the oil pump unit 30 connected to the second end 232 and the outlet end 21 connected to the main pipeline 20 with the first end 231 can also ensure that the oil in the main pipeline 20 is easier to discharge. In some embodiments, the diameter of the first end 231 of the buffer line 23 matches the diameter of the outlet end 21, and the diameter of the second end 232 of the buffer line 23 matches the inlet size of the oil pump unit 30 (pump 31). In some embodiments, the first end 231 of the buffer line 23 can be located at the same horizontal plane as the outlet end 21, and the second end 232 of the buffer line 23 is located at a position lower than the first end 231 of the buffer line 23, so that there is a terrain difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main line 20, so that the inlet of the pump 31 is filled with oil to ensure normal startup. In some other embodiments, the first end 231 of the buffer line 23 is tilted and may have a preset angle with the outlet end 21, and the second end 232 of the buffer line 23 may be horizontally set and the setting position is lower than the setting position of the outlet end 21, so that there is a terrain difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main line 20, so that the inlet of the pump 31 is filled with oil to ensure normal startup.

[0075] Figure 8 FIG. 2 is a schematic diagram of the structure of another embodiment of the aviation fuel storage system 200 of the present application. Figure 8As shown, the oil recovery quality inspection system 100 includes a buffer tank 24, which is arranged at the outlet end 21. By setting the buffer tank 24 at a position lower than the main pipeline 20, and setting the oil pump unit 30 in the buffer tank 24 (at Figure 8 In the embodiment shown, the pump 31 and the inlet valve 32 are arranged in the buffer tank 24 to ensure that the inlet of the pump 31 is filled with oil as much as possible), and the pipeline connected to the inlet valve 32 connected to the inlet of the pump 31 extends along the wall of the buffer tank 24 (such as Figure 8 As shown), since the amount of oil discharged from the bottom of each oil storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, by arranging the oil pump unit 30 in a buffer tank 24 with relatively low terrain, there is a terrain difference between the inlet of the oil pump unit 30 (pump 31) and the outlet end 21 of the main pipeline 20. On the one hand, the oil discharged from the bottom of multiple oil storage tanks 50 can be better aggregated and uniformly flowed into the main pipeline 20, ensuring that the inlet of the pump 31 is filled with as much oil as possible to ensure normal startup. On the other hand, the oil in the main pipeline 20 can be discharged smoothly.

[0076] In some embodiments, the oil recovery unit 40 includes a first oil recovery unit 40a and a second oil recovery unit 40b, and the first oil recovery unit 40a and the second oil recovery unit 40b are connected in parallel between the outlet and the inlet end 22 of the oil pump unit 30, and the quality of the oil recovered by the first oil recovery unit 40a is higher than the quality of the oil recovered by the second oil recovery unit 40b. When the oil is recovered, the clean oil is discharged into the first oil recovery unit 40a, and the oil with lower quality or with water or impurities is discharged into the second oil recovery unit 40b. Such a setting can effectively classify and process oils of different qualities to avoid waste of oil. For example, the clean oil can be tested again, and if it meets the oil quality, it can be recycled. For the oil with lower quality or with water or impurities, other treatments are performed, for example, it can be discharged into a water-oil separation tank or a dirty oil tank or an oil tank bottom discharge operation. The specific measures taken can be selected according to the actual quality of the oil, and are not limited in this application.

[0077] It should be noted that the first oil recovery unit 40a and the second oil recovery unit 40b have the same structure. Figure 1 The same reference numerals are used in the illustrated embodiments and will not be described in detail herein.

[0078] In some embodiments, the recovery line 60 includes a first recovery line 61 and a second recovery line 62, and the oil recovery unit 40 includes a recovery tank 41 and a second flow meter 42. The recovery tank 41 is connected to the outlet (outlet valve 33) of the oil pump unit 30 through the first recovery line 61, and the second flow meter 42 is connected to the inlet end 22 through the second recovery line 62. The recovery tank 41 is used to recover the oil discharged by the pump 31. To prevent microbial contamination, the second flow meter 42 is used to measure the amount of oil flowing out of the recovery tank 41. The second flow meter 42 can be a vortex flow meter. In some other embodiments, the first flow meter 11 can also be a float flow meter. In other embodiments, the second flow meter 42 can also be other types of flow meters, which are not limited to this in the present application. It should be noted that the second flow meter 42 is similar to the first flow meter 11 of the above embodiment, and its structure and principle are also similar, which will not be repeated here.

[0079] In some embodiments, the oil recovery unit 40 includes a second solenoid valve 421 and a second controller 422, which are arranged at the inlet of the second flowmeter 42, and the second solenoid valve 421 is used to control the opening or closing of the inlet of the second flowmeter 42. The second controller 422 is electrically connected to the second solenoid valve 421 and the second flowmeter 42, and the second controller 422 is used to control the second solenoid valve 421 to disconnect when the flow of the second flowmeter 42 reaches a preset capacity, so as to close the inlet of the second flowmeter 42. In some embodiments, when the oil at the bottom of the recovery tank 41 needs to be discharged into the second flowmeter 42, the second controller 422 controls the second solenoid valve 421 to open, and the second flowmeter 42 starts to measure the oil flowing out from the bottom of the recovery tank 41. In some embodiments, when the amount of oil in the second flowmeter 42 reaches the preset capacity, a feedback signal is sent to the second controller 422, and at this time, the second controller 422 controls the second solenoid valve 421 to close, and the second flowmeter 42 stops measuring the oil flowing out from the bottom of the recovery tank 41.

[0080] In some embodiments, the second recovery pipeline 62 is provided with a first ball valve 621, and the first ball valve 621 is arranged downstream of the outlet of the second flow meter 42. Before checking the discharge, the first ball valve 621 is in a closed state. In order to prevent the oil products (such as oil products of low quality) retained in the second flow meter 42 from being discharged to the main pipeline 20, it is opened before the recovery and discharge is required, and closed when the recovery and discharge are not required, so as to avoid mixing with clean oil products and avoid waste. In some embodiments, the recovery pipeline 60 includes a third recovery pipeline 63 and a fourth recovery pipeline 64, the second flow meter 42 is connected to the waiting pool 44 through the third recovery pipeline 63, and the second flow meter 42 is connected to the zero-level tank 45 through the fourth recovery pipeline 64. The quality of the oil products stored in the waiting pool 44 is higher than the quality of the oil products stored in the zero-level tank 45. Since the oil quality inspection unit 10 receives the oil at the bottom of the oil storage tank 50, it will contain some water or impurities after long-term sedimentation, and will be discharged into the recovery tank 41 through the main pipeline 20 and the oil pump unit 30 in turn. Therefore, most of the oil recovered in the recovery tank 41 contains water or impurities, so the oil in the recovery tank 41 is received again through the second flow meter 42 for classification and processing, for example, it is discharged into the waiting pool 44 and the zero-level tank 45 with different oil quality, so as to avoid waste of oil. The waiting pool 44 here can be an oil pollution treatment pool, and the zero-level tank 45 can be an underground waste oil tank, and the quality of the oil stored therein is lower than the quality of the oil stored in the oil pollution treatment pool.

[0081] In some embodiments, a second ball valve 631 is provided on the third recovery line 63, and the second ball valve 631 is provided upstream of the inlet of the treatment pool 44. Since the second ball valve 631 is provided at the bottom of the second flow meter 42, the second ball valve 631 is in a closed state before the discharge is checked, so as to prevent the oil products (such as clean oil products) retained in the second flow meter 42 from being discharged into the treatment pool 44, so it is opened before the recovery and discharge are required to avoid the clean oil products from being mixed into the treatment pool 44, thereby avoiding waste. In some embodiments, a third ball valve 641 is provided on the fourth recovery line 64, and the third ball valve 641 is provided upstream of the inlet of the zero tank 45. Since the third ball valve 641 is provided at the bottom of the second flow meter 42, the third ball valve 641 is in a closed state before the discharge is checked, so as to prevent the oil products (such as clean oil products) retained in the second flow meter 42 from being discharged into the zero tank 45, so it is opened before the recovery and discharge are required to avoid the clean oil products from being mixed into the zero tank 45, thereby avoiding waste. In some embodiments, the first ball valve 621 is set at a higher position than the second ball valve 631 and the third ball valve 641. Since some impurities or water settle at the bottom of the mixed oil (the mixed oil here refers to the oil containing water or impurities), the second ball valve 631 and the third ball valve 641 are set at the bottom of the second flow meter 42, and the first ball valve 621 is set at a higher position than the second ball valve 631 and the third ball valve 641, so that the water or impurities in the second flow meter 42 are easier to discharge. In this process, when metering is required, the second controller 422 sends a control signal to the second solenoid valve 421 to open the second solenoid valve 421. At this time, the second flow meter 42 starts metering. When the second flow meter 42 reaches the preset capacity, a feedback signal is sent to the second controller 422. At this time, the second controller 422 controls the second solenoid valve 421 to close to end the metering.

[0082] In some embodiments, a safety level line is provided in the recovery tank 41, and the safety level line does not exceed half of the height of the recovery tank 41. In this embodiment, the height of the recovery tank 41 is 8 meters, and the safety level line does not exceed half of the height of the recovery tank 41, that is, it must not exceed 4 meters. In this embodiment, the safety level line is set to 3.5 meters, leaving more than half of the space, so that the oil products can be recovered in emergency situations. In some embodiments, the oil product recovery quality inspection system 100 also includes a plurality of spare tanks 70 and a delivery pipeline 80, and the spare tank 70 is connected to the recovery tank 41 through the delivery pipeline 80. The delivery pipeline 80 is used to transport at least part of the oil products in the recovery tank 41 to the spare tank 70 for storage when the oil products in the recovery tank 41 exceed the safety level line. In this embodiment, for example, when the oil products in the recovery tank 41 exceed 3.5 meters, the recovered oil products will be transported to the empty spare tank 70 for storage through the delivery pipeline 80, and it is necessary to re-test whether it meets the standard when it is reused. It can only be reused if it meets the standard, so as to be used as a recycling and recycling, thereby avoiding the waste of oil products.

[0083] In some embodiments, the recovery pipeline 60 includes a fifth recovery pipeline 65 and a sixth recovery pipeline 66; the oil quality inspection unit 10 includes a first flow meter 11, the first flow meter 11 is connected to the oil storage tank 50 through the fifth recovery pipeline 65, and the first flow meter 11 is connected to the inlet end 22 through the sixth recovery pipeline 66. The first flow meter 11 is used to measure the amount of oil flowing out from the bottom of the oil storage tank 50. Since the recovery pipeline 60 connected between the first flow meter 11 (or the sampler 13) and the oil storage tank 50 has a distance, the first flow meter 11 is required to measure the amount of part of the oil at the bottom of the oil storage tank 50 (wherein the part of the oil here includes the oil in the fifth recovery pipeline 65 connected between the first flow meter 11 and the oil storage tank 50) to discharge part of the oil to the first flow meter 11, so that the oil obtained by the subsequent sampler 13 is more representative. When metering is required, the controller 112 sends a control signal to the first solenoid valve 111 to open the first solenoid valve 111. At this time, the first flowmeter 11 starts metering. When the first flowmeter 11 reaches the preset capacity, a feedback signal is sent to the first controller 112. At this time, the first controller 112 controls the first solenoid valve 111 to close to end the metering. The preset capacity here can be 70L-90L, preferably 80L. The first flowmeter 11 can measure the amount of oil flowing out from the bottom of the oil storage tank 50. When the outflow reaches the preset capacity, the first solenoid valve 111 is controlled by the first controller 112 to close the inlet of the first flowmeter 11. At this time, the amount of oil flowing out from the bottom of the oil storage tank 50 can be observed in the display 114 of the first flowmeter 11, which is convenient for the staff to observe. At the same time, the staff can also observe the instantaneous value of the amount of oil flowing out from the bottom of the oil storage tank 50 in the display 114. Compared with the related art, the first flow meter 11 can measure the amount of oil (including total amount and instantaneous flow rate) flowing out from the bottom of the oil storage tank 50, but it does not require observation by staff, thus preventing staff from directly facing the oil, which is beneficial to the health of the staff and does not cause pollution to the environment.

[0084] In this embodiment, the oil storage tank 50 is a cone bottom tank (such as Figure 1As shown in FIG. 1 , the static pressure generated by the cone bottom tank is utilized, and the fifth recovery pipeline 65 and the sixth recovery pipeline 66 are arranged at the same horizontal plane, and the fifth recovery pipeline 65 and the sixth recovery pipeline 66 are arranged at the same horizontal plane, so that the moisture and impurities at the bottom of the oil storage tank 50 are easily discharged. In addition, since the entire system occupies a large area, by arranging the fifth recovery pipeline 65 and the sixth recovery pipeline 66 at the same horizontal plane, the construction difficulty can be reduced, thereby reducing the cost. In some embodiments, the fifth recovery pipeline 65 is provided with a fourth ball valve 651 and a first automatic return valve 652, and the fourth ball valve 651 is arranged downstream of the outlet of the oil storage tank 50. In some embodiments, the fourth ball valve 651 is kept in a normally open state. Such a setting can keep the oil in the fifth recovery pipeline 65. When detection is required, the first automatic return valve 652 needs to be opened to allow the oil in the oil storage tank 50 to flow into the first flow meter 11. At this time, the pressure of the oil received by the first automatic return valve 652 is slowly released, rather than increasing instantly, thereby protecting the first flow meter 11. Because in this embodiment, the oil storage tank 50 adopts a cone bottom tank, which will generate a strong static pressure. If the fourth ball valve 651 is kept in a closed state and opened only when detection is required, a large pressure will be generated at this time, which will cause too much pressure on the fifth recovery pipeline 65 and the first flow meter 11. Therefore, in order to avoid potential safety hazards, the fourth ball valve 651 is kept in a normally open state first, which can alleviate the static pressure generated at the bottom of the oil storage tank 50, thereby improving safety. In some embodiments, the first automatic return valve 652 is arranged upstream of the inlet of the first flow meter 11. The first automatic return valve 652 is opened when detection is required. When the oil in the first flow meter 11 reaches a preset capacity, the first solenoid valve is controlled to close by the first controller 112 to close the inlet of the first flow meter 11, without the need for staff operation, which is convenient and quick. In some embodiments, the sixth recovery pipeline 66 is provided with a fifth ball valve 661, and the fifth ball valve 661 is arranged downstream of the outlet of the first flow meter 11. It is opened when the oil in the first flow meter 11 needs to be discharged. In order to prevent the oil remaining in the first flow meter 11 (for example, oil of poor quality) from being discharged to the main pipeline 20, it can be opened before it is needed to be recovered and discharged to avoid mixing with clean oil and avoid waste.

[0085] In some embodiments, the recovery pipeline 60 includes a seventh recovery pipeline 67 and an eighth recovery pipeline 68; the oil quality inspection unit 10 includes a sampler 13, the sampler 13 is connected to the fifth recovery pipeline 65 through the seventh recovery pipeline 67, and the sampler 13 is connected to the sixth recovery pipeline 66 through the eighth recovery pipeline 68. In this embodiment, the eighth recovery pipeline 68 is connected to the sixth recovery pipeline 66, and is gathered to the same point, and then connected to the inlet end 22 of the main pipeline 20, which can reduce the number of inlet ends 22 set on the main pipeline 20. In addition, the eighth recovery pipeline 68 and the sixth recovery pipeline 66 are gathered to the same point for assembly, which is convenient for assembly and maintenance. In some embodiments, a quality inspection scale line is provided in the sampler 13 (for example, at a position four-fifths of the sampling area of ​​the sampler). When testing is needed, the oil is discharged into the sampler 13 to the quality inspection scale line for observation, mainly to visually inspect whether the oil contains free water, suspended water and solid impurities. If the moisture content cannot be determined by visual inspection, a water detector can be used to further check whether the oil contains moisture (for quality inspection of tanks currently in use, spare tanks or spot checks on the quality of oil storage tanks, a water detector must be used to check the moisture content of the oil).

[0086] In this embodiment, the oil storage tank 50 is a cone bottom tank (such as Figure 1 As shown in the figure, by utilizing the static pressure generated by the cone-bottom tank, the seventh recovery pipeline 67 and the eighth recovery pipeline 68 are arranged at the same horizontal plane, so that the moisture and impurities at the bottom of the oil storage tank 50 are easily discharged. In addition, since the entire system occupies a large area, by arranging the seventh recovery pipeline 67 and the eighth recovery pipeline 68 at the same horizontal plane, the construction difficulty can be reduced, thereby reducing the cost. By setting the seventh recovery pipeline 67 and the eighth recovery pipeline 68 at a position not higher than the fifth recovery pipeline 65 and the sixth recovery pipeline 66, more oil (containing moisture and impurities) at the bottom of the oil storage tank 50 is discharged to the sampler 13, so that the sampler 13 can detect whether the oil contains free water, suspended moisture and solid impurities. In some embodiments, the seventh recovery pipeline 67 is provided with a second automatic return valve 671, and the second automatic return valve 671 is arranged upstream of the inlet of the sampler 13. The second automatic return valve 671 is opened when testing is required, and is automatically closed when the oil in the sampler 13 reaches the quality inspection scale line, without the need for staff operation, which is convenient and quick.

[0087] When inspecting the oil quality, first check whether the fourth ball valve 651 remains normally open (generally, the fourth ball valve 651 remains normally open, if the fourth ball valve 651 is closed, open it), and then open the fifth ball valve 661 to ensure that the fifth recovery pipeline 65 and the sixth recovery pipeline 66 connected to the first flow meter 11 are connected to ensure that the oil in the fifth recovery pipeline 65 and the sixth recovery pipeline 66 can flow out smoothly.

[0088] Further, the second automatic return valve 671 is opened to flush the sampler 13. The oil is discharged to the quality inspection scale line (approximately at the four-fifths position of the closed-circuit sampler), and then the second automatic return valve 671 is closed, and then the ball valve (not shown) at the bottom of the outlet of the sampler 13 is opened to drain, and finally the ball valve at the bottom of the outlet of the sampler 13 is closed. This step is used to flush the sampler 13 with the oil to be inspected, so that the detection result is more accurate.

[0089] Further, the first automatic return valve 652 is opened, and the first electromagnetic valve 111 is controlled to open by the first controller 112, so that the first flow meter 11 starts to measure. In this process, the amount of oil flowing out from the bottom of the oil storage tank 50 can be observed by observing the display 114 of the first flow meter 11, and the staff does not need to face the oil directly, which can avoid harm to the body and pollution to the environment. After the first flow meter 11 reaches a preset capacity (for example, 70L-90L, preferably 80L), the first electromagnetic valve 111 is controlled to close by the first controller 112, so that the first flow meter 11 ends the measurement, and then the first automatic return valve 652 is closed. Since the fifth recovery pipeline 65 connected between the first flow meter 11 and the oil storage tank 50 has a distance, it is necessary to discharge part of the oil to the first flow meter 11. The function of the first flow meter 11 is to measure the amount of oil flowing out from the bottom of the oil storage tank 50. The partial oil products here include partial oil products discharged from the fifth recovery pipeline 65 connected between the first flow meter 11 and the oil storage tank 50. Such an arrangement makes the detection result of the subsequent sampler 13 more accurate.

[0090] Further, the second automatic return valve 671 is opened, and the oil is discharged to the sampler to the quality inspection scale line (about four-fifths of the closed-circuit sampling area), and then the second automatic return valve 671 is closed. Then the oil is visually inspected to see if it contains free water, suspended water and solid impurities. If the visual inspection cannot determine the water content, a water detector (not shown) can be used to further check whether the oil contains water (a water detector must be used to check the water content of the oil for quality inspection of the current use or spare tank or spot check of the oil storage tank).

[0091] Further, the fifth ball valve 661 and the ball valve at the bottom of the sampler 13 outlet are opened, and the oil is discharged to the inlet end 22 of the main pipeline 20. Then, the oil is recovered to the oil recovery unit 40 (for example, discharged to the first oil recovery unit 40a) through the oil pump unit 30. It should be noted that in order to ensure that the recovery pipeline 60 and the main pipeline 20 are smooth, before checking this step, it is necessary to confirm whether the valve connected to the oil recovery unit 40 has been opened, which will not be repeated here.

[0092] Further, if the oil quality inspection does not meet the requirements, after the above steps are completed, close the fifth ball valve 661 and the ball valve at the bottom of the sampler 13 outlet. Repeat the above steps until the oil quality inspection meets the requirements. If the oil quality inspection meets the requirements, proceed to the next step.

[0093] Further, after the operation is completed, the fifth ball valve 661 is first closed and locked (and the fourth ball valve 651 is kept in a normally open state). Then the first automatic return valve 652 is opened to drain the fifth recovery pipeline 65. And the second automatic return valve 671 is opened to drain the seventh recovery pipeline 67. Then the first automatic return valve 652, the second automatic return valve 671, the fifth ball valve 661 and the ball valve provided at the bottom of the sampler outlet are closed in sequence.

[0094] When the oil is recovered, the second solenoid valve 421 is first controlled to open by the second controller 422 so that the second flow meter 42 starts measuring. In this process, the amount of oil flowing out from the bottom of the oil storage tank 50 displayed on the display 114 of the second flow meter 42 is observed. When the preset capacity is reached, the second solenoid valve 421 is controlled to close by the second controller 422 so that the second flow meter 42 ends measuring. Then the oil in the second flow meter 42 is visually checked. If it contains a small amount or trace amount of water impurities, the first ball valve 621 can be opened to allow the oil to flow into the inlet end 22 of the main line 20, and then recovered to the oil recovery unit (for example, discharged into the first oil recovery unit 40a) through the oil pump unit 30. And the third ball valve 641 can be opened to discharge the oil at the bottom of the second flow meter 42 into the zero tank 45. If it contains a large amount of impurities or water, the second ball valve 631 can be opened to discharge the oil to the treatment pool 44 for oil-water separation. In this way, the waste of oil discharged into the treatment pool 44, the zero tank 45 and the first oil recovery unit 40a with different oil quality can be avoided. Further, the above steps are repeated until the oil in the second flow meter 42 is visually checked to be free of a large amount of water and impurities, and then the second automatic return valve 671 upstream of the inlet of the sampler 13 is opened again to visually check whether the oil contains free water, suspended water and solid impurities.

[0095] Further, after the operation is completed, the fifth ball valve 661 is first closed and locked (and the fourth ball valve 651 located downstream of the outlet of the oil storage tank 50 is kept in a normally open state). The first automatic return valve 652 is opened to drain the fifth recovery pipeline 65. The second automatic return valve 671 is opened to drain the seventh recovery pipeline 67. Then the first automatic return valve 652, the second automatic return valve 671, the fifth ball valve 661 and the ball valve located at the bottom of the sampler outlet are closed, and the first ball valve 621, the second ball valve 631 and the third ball valve 641 are also closed.

[0096] Furthermore, if the first flow meter 11 observes that the oil in the oil storage tank 50 always contains a lot of water or impurities, the bottom draining operation of the oil storage tank 50 can be performed. For example, when the bottom draining operation of the oil storage tank 50 is performed, the oil truck oil withdrawal operation or the oil tank bottom oil pumping operation cannot be performed at the same time. Or if the oil storage tank 50 meets the settling time after the oil is filled with oil or the oil quality is checked by the first flow meter 11 and there is always a lot of water and impurities, the oil tank bottom draining operation is performed. Among them, the settling time of the oil storage tank 50 after the oil is collected is: jet fuel per meter liquid column is not less than 3 hours. Under special circumstances, the oil storage tank 50 equipped with a float type oil suction pipe should be left for no less than 8 hours. In some embodiments, the bottom draining operation of the oil storage tank 50 is to drain the bottom of the second oil recovery unit 40b. Before the bottom draining operation, the oil quality of the recovery tank 41 of the second oil recovery unit 40b is checked, and then the electric valve (not shown) is opened, and then the dirty oil pipeline valve of the recovery tank 41 to be drained is opened, and the bottom is drained to the recovery tank 41 by self-pressure. After the bottom draining is completed, the electric valve and the dirty oil pipeline valve of the bottom recovery tank 41 are closed, and then the oil quality of the bottom draining tank is checked again according to the above process. With such a setting, oil products of different qualities can be effectively classified and processed for recycling and utilization.

[0097] The technical solutions disclosed in the embodiments of this application can complement each other without causing conflicts. The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. An oil recovery quality inspection system, characterized in that: include: A main pipe, including an outlet port and multiple inlet ports; An oil pump unit, wherein the inlet of the oil pump unit is connected to the outlet; A plurality of oil quality inspection units, which are used to be connected to corresponding oil storage tanks and are distributed at intervals along the main pipeline, wherein the oil quality inspection units include a first flow meter and a sampler, wherein the first flow meter and the sampler are connected in parallel between the outlet and the inlet of the oil storage tank, wherein the first flow meter is used to measure the amount of oil flowing out from the bottom of the oil storage tank, and the sampler is used to sample and inspect the oil at the bottom of the oil storage tank; An oil recovery unit, wherein the inlet of the oil recovery unit is connected to the outlet of the oil pump unit, the outlet of the oil recovery unit is connected to the inlet end, the main pipeline is used to receive the oil flowing out of the oil quality inspection unit, the oil pump unit is used to transport the oil in the main pipeline to the oil recovery unit, and the oil recovery unit is used to recover and store the oil; The oil product recovery quality inspection system comprises a first solenoid valve, which is arranged at the inlet of the first flow meter, and the first solenoid valve is used to control the opening or closing of the inlet of the first flow meter; The oil recovery unit includes a first oil recovery unit and a second oil recovery unit. The first oil recovery unit and the second oil recovery unit are connected in parallel between the outlet and the inlet end of the oil pump unit. The quality of the oil recovered by the first oil recovery unit is higher than the quality of the oil recovered by the second oil recovery unit.

2. The oil recovery quality inspection system according to claim 1 is characterized in that: The oil recovery quality inspection system includes a first controller electrically connected to the first solenoid valve and the first flow meter. The first controller is used to control the first solenoid valve to disconnect when the oil volume in the first flow meter reaches a preset capacity, so as to close the inlet of the first flow meter.

3. The oil recovery quality inspection system according to claim 1 is characterized in that: The oil product recovery and quality inspection system further comprises a recovery pipeline, and the plurality of oil product quality inspection units are distributed at intervals on both sides of the main pipeline and are connected to the inlet end through the recovery pipeline.

4. The oil recovery quality inspection system according to claim 3 is characterized in that: The main pipeline and the recovery pipeline are arranged on the same horizontal plane.

5. The oil recovery quality inspection system according to claim 1, characterized in that: The inlet of the oil pump unit is arranged at a position lower than the outlet.

6. The oil recovery quality inspection system according to claim 1, characterized in that: The oil recovery quality inspection system also includes a buffer pipeline, the inlet of the buffer pipeline is connected to the outlet end, the outlet of the buffer pipeline is connected to the inlet of the oil pump unit, and the setting position of the inlet of the buffer pipeline is lower than the setting position of the outlet end.

7. The oil recovery quality inspection system according to claim 6, characterized in that: The buffer pipeline includes a first end connected to the outlet end and a second end connected to the inlet of the oil pump unit, and the second end is arranged at a position lower than the first end.

8. The oil recovery quality inspection system according to claim 1, characterized in that: The oil product recovery quality inspection system also includes a buffer tank, which is arranged at the outlet end. The buffer tank is arranged at a position lower than the main pipeline. The oil pump unit is arranged in the buffer tank.

9. The oil recovery quality inspection system according to claim 3, characterized in that: The oil recovery unit includes a second flow meter and a recovery tank, the inlet of the recovery tank is connected to the outlet of the oil pump unit, the second flow meter is connected between the outlet and the inlet of the recovery tank, the second flow meter is used to measure the amount of oil at the bottom of the recovery tank, and the recovery tank is used to recover and store the oil.

10. The oil recovery quality inspection system according to claim 9, characterized in that: The oil product recovery quality inspection system comprises a second solenoid valve, which is arranged at the inlet of the second flow meter, and the second solenoid valve is used to control the opening or closing of the inlet of the second flow meter.

11. The oil recovery quality inspection system according to claim 10, characterized in that: The oil recovery quality inspection system includes a second controller electrically connected to the second solenoid valve and the second flow meter. The second controller is used to control the second solenoid valve to cut off power when the oil volume in the second flow meter reaches a preset capacity, so as to close the inlet of the second flow meter.

12. The oil recovery quality inspection system according to claim 11, characterized in that: The recovery pipeline includes a first recovery pipeline and a second recovery pipeline. The recovery tank is connected to the outlet of the oil pump unit through the first recovery pipeline, and the second flow meter is connected to the inlet end through the second recovery pipeline.

13. The oil recovery quality inspection system according to claim 12, characterized in that: The recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline. The second flowmeter is connected to the treatment pool through the third recovery pipeline. The second flowmeter is connected to the zero-level tank through the fourth recovery pipeline. The quality of the oil stored in the treatment pool is higher than the quality of the oil stored in the zero-level tank.

14. The oil recovery quality inspection system according to claim 13, characterized in that: The recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline; the first flow meter is connected to the oil storage tank through the third recovery pipeline, and the first flow meter is connected to the inlet end through the fourth recovery pipeline.

15. The oil recovery quality inspection system according to claim 14, characterized in that: The recovery pipeline includes a fifth recovery pipeline and a sixth recovery pipeline; the sampler is connected to the third recovery pipeline through the fifth recovery pipeline, and the sampler is connected to the fourth recovery pipeline through the sixth recovery pipeline.

16. An aviation fuel storage system, characterized in that: It comprises a plurality of oil storage tanks and an oil recovery quality inspection system as claimed in any one of claims 1 to 15, wherein the plurality of oil quality inspection units of the oil recovery quality inspection system correspond to the plurality of oil storage tanks.

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